/* ══════════════════════════════════
   BLOG DETAIL PAGE
══════════════════════════════════ */

/* Top nav (sticky) */
.top-nav {
  position: sticky; top: 0; z-index: 200;
  background: var(--navy);
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem;
  box-shadow: 0 2px 20px rgba(0,0,0,.4);
}
.brand { display: flex; align-items: center; gap: .6rem; font-family: 'Playfair Display', serif; font-size: 1.1rem; font-weight: 700; color: #fff; letter-spacing: .05em; text-decoration: none; }
.brand .ico { width: 34px; height: 34px; background: var(--orange); border-radius: 7px; display: flex; align-items: center; justify-content: center; font-family: 'JetBrains Mono', monospace; font-size: .68rem; font-weight: 600; color: #fff; }
.brand span { color: var(--orange); }
.back-btn  { display: inline-flex; align-items: center; gap: .45rem; color: rgba(255,255,255,.8); font-size: .83rem; font-weight: 500; text-decoration: none; border: 1px solid rgba(255,255,255,.22); padding: .4rem 1rem; border-radius: 6px; transition: color .2s, border-color .2s, background .2s; }
.back-btn:hover { color: var(--orange2); border-color: var(--orange2); background: rgba(224,123,57,.08); }

/* Hero */
.art-hero { padding: 5rem 2rem 4rem; background: linear-gradient(135deg, var(--navy) 0%, var(--navy3) 100%); color: #fff; text-align: center; position: relative; overflow: hidden; }
.art-hero::before { content: ''; position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(224,123,57,.05) 1px,transparent 1px), linear-gradient(90deg,rgba(224,123,57,.05) 1px,transparent 1px); background-size: 44px 44px; }
.hero-inner   { max-width: 820px; margin: 0 auto; position: relative; z-index: 1; }
.art-tag      { font-family: 'JetBrains Mono', monospace; font-size: .68rem; letter-spacing: .22em; text-transform: uppercase; color: var(--orange2); display: block; margin-bottom: 1rem; }
.art-title    { font-family: 'Playfair Display', serif; font-size: clamp(1.8rem,4.5vw,3rem); font-weight: 700; line-height: 1.2; margin-bottom: 1.4rem; }
.art-meta     { display: flex; justify-content: center; gap: 1.8rem; flex-wrap: wrap; font-size: .82rem; color: rgba(255,255,255,.55); }
.art-divider  { width: 60px; height: 3px; margin: 2rem auto 0; border-radius: 2px; background: linear-gradient(90deg, var(--orange), var(--orange2)); }

/* Article body */
.art-body             { max-width: 820px; margin: 0 auto; padding: 3.5rem 2rem 5rem; }
.art-body h2          { font-family: 'Playfair Display', serif; font-size: 1.6rem; color: var(--navy); margin: 2.5rem 0 1rem; padding-bottom: .5rem; border-bottom: 2px solid var(--orange-light); }
.art-body h3          { font-family: 'Playfair Display', serif; font-size: 1.2rem; color: var(--navy); margin: 1.8rem 0 .7rem; }
.art-body p           { font-size: .97rem; line-height: 1.88; color: var(--text); margin-bottom: 1.25rem; }
.art-body ul, .art-body ol { margin: 1rem 0 1.5rem 1.6rem; font-size: .95rem; line-height: 1.88; color: var(--text); }
.art-body li          { margin-bottom: .5rem; }
.art-body strong      { color: var(--navy); }
.art-body em          { font-style: italic; }
.art-body code        { font-family: 'JetBrains Mono', monospace; font-size: .82rem; background: var(--cream); padding: .1rem .38rem; border-radius: 3px; color: var(--orange); }

/* Code block */
.code-block     { background: var(--code); border-radius: 10px; padding: 1.6rem 1.8rem; margin: 1.6rem 0; overflow-x: auto; }
.code-block pre { font-family: 'JetBrains Mono', monospace; font-size: .82rem; color: rgba(255,255,255,.9); line-height: 1.78; margin: 0; white-space: pre; }
.kw  { color: #ff9d6f; }
.cl  { color: #7ec8e3; }
.st  { color: #a8d8a8; }
.an  { color: #c3a6ff; }
.cm  { color: rgba(255,255,255,.38); }

/* Callout */
.callout        { background: var(--orange-light); border-left: 4px solid var(--orange); border-radius: 0 8px 8px 0; padding: 1.15rem 1.5rem; margin: 1.6rem 0; font-size: .93rem; line-height: 1.75; color: #7a3a10; }
.callout strong { color: var(--orange); }

/* Chips */
.chip-row { display: flex; flex-wrap: wrap; gap: .5rem; margin: 2.2rem 0 0; }
.chip     { font-family: 'JetBrains Mono', monospace; font-size: .67rem; padding: .3rem .82rem; border-radius: 20px; background: var(--cream); border: 1px solid var(--border); color: var(--muted); }

/* Bottom bar */
.bottom-bar { max-width: 820px; margin: 0 auto; padding: 2rem; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.back-link  { display: inline-flex; align-items: center; gap: .5rem; background: var(--navy); color: #fff; padding: .65rem 1.4rem; border-radius: 7px; font-size: .85rem; font-weight: 600; text-decoration: none; transition: background .2s; }
.back-link:hover { background: var(--navy3); }

/* Related */
.related        { background: var(--cream); padding: 3rem 2rem; border-top: 1px solid var(--border); }
.related-inner  { max-width: 820px; margin: 0 auto; }
.related-inner h3 { font-family: 'Playfair Display', serif; font-size: 1.35rem; color: var(--navy); margin-bottom: 1.5rem; }
.rel-grid       { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.2rem; }
.rel-card       { background: #fff; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); cursor: pointer; text-decoration: none; display: block; transition: box-shadow .22s, transform .22s; }
.rel-card:hover { box-shadow: 0 8px 28px rgba(15,31,61,.1); transform: translateY(-3px); }
.rel-thumb      { height: 110px; display: flex; align-items: center; justify-content: center; font-size: 2.2rem; }
.rel-body       { padding: 1rem; }
.rel-tag        { font-family: 'JetBrains Mono', monospace; font-size: .6rem; letter-spacing: .12em; text-transform: uppercase; color: var(--orange); font-weight: 600; display: block; margin-bottom: .3rem; }
.rel-card h4    { font-family: 'Playfair Display', serif; font-size: .93rem; color: var(--navy); line-height: 1.35; }

/* Panel system */
.article-panel        { display: none; }
.article-panel.active { display: block; }

/* Page footer */
.pg-footer     { background: var(--navy); color: rgba(255,255,255,.5); padding: 1.5rem 2rem; text-align: center; font-size: .78rem; }
.pg-footer a   { color: var(--orange2); text-decoration: none; }
.pg-footer a:hover { text-decoration: underline; }

/* ── Responsive ── */
@media (max-width: 700px) {
  .art-hero   { padding: 3.5rem 1.25rem 3rem; }
  .art-body   { padding: 2.5rem 1.25rem 4rem; }
  .bottom-bar { padding: 2rem 1.25rem; }
  .related    { padding: 2.5rem 1.25rem; }
  .rel-grid   { grid-template-columns: 1fr; }
}